Re: [PATCH v2 05/11] drm/panel: Add panel driver for Samsung SOFEF01 DDIC

[kernel test robot <lkp@intel.com>]

Hi Marijn,

kernel test robot noticed the following build warnings:

[auto build test WARNING on cc3aa43b44bdb43dfbac0fcb51c56594a11338a8]

url:    https://github.com/intel-lab-lkp/linux/commits/Marijn-Suijten/drm-panel-Clean-up-SOFEF00-config-dependencies/20251222-073548
base:   cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
patch link:    https://lore.kernel.org/r/20251222-drm-panels-sony-v2-5-82a87465d163%40somainline.org
patch subject: [PATCH v2 05/11] drm/panel: Add panel driver for Samsung SOFEF01 DDIC
config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20251224/202512242356.EwESE8Qv-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251224/202512242356.EwESE8Qv-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512242356.EwESE8Qv-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/panel/panel-samsung-sofef01.c:389:20: warning: cast to smaller integer type 'enum panel_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
           ctx->panel_type = (enum panel_type)of_device_get_match_data(dev);
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +389 drivers/gpu/drm/panel/panel-samsung-sofef01.c

   357	
   358	static int samsung_sofef01_m_probe(struct mipi_dsi_device *dsi)
   359	{
   360		const struct backlight_properties props = {
   361			.type = BACKLIGHT_RAW,
   362			.brightness = 100,
   363			.max_brightness = 1023,
   364		};
   365		struct device *dev = &dsi->dev;
   366		struct samsung_sofef01_m *ctx;
   367		int ret;
   368	
   369		ctx = devm_drm_panel_alloc(dev, struct samsung_sofef01_m, panel,
   370					   &samsung_sofef01_m_panel_funcs,
   371					   DRM_MODE_CONNECTOR_DSI);
   372		if (IS_ERR(ctx))
   373			return PTR_ERR(ctx);
   374	
   375		ret = devm_regulator_bulk_get_const(
   376			dev,
   377			ARRAY_SIZE(samsung_sofef01_m_supplies),
   378			samsung_sofef01_m_supplies,
   379			&ctx->supplies);
   380		if (ret < 0)
   381			return dev_err_probe(dev, ret, "Failed to get regulators\n");
   382	
   383		ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
   384		if (IS_ERR(ctx->reset_gpio))
   385			return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
   386					     "Failed to get reset-gpios\n");
   387	
   388		ctx->dsi = dsi;
 > 389		ctx->panel_type = (enum panel_type)of_device_get_match_data(dev);
   390		if (ctx->panel_type == PANEL_TYPE_TC01)
   391			ctx->mode = &samsung_sofef01_m_61_142_mode;
   392		else if (ctx->panel_type == PANEL_TYPE_DK01)
   393			ctx->mode = &samsung_sofef01_m_61_141_mode;
   394		else
   395			ctx->mode = &samsung_sofef01_m_60_139_mode;
   396		mipi_dsi_set_drvdata(dsi, ctx);
   397	
   398		dsi->lanes = 4;
   399		dsi->format = MIPI_DSI_FMT_RGB888;
   400		dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
   401	
   402		ctx->panel.prepare_prev_first = true;
   403	
   404		ctx->panel.backlight = devm_backlight_device_register(
   405			dev, dev_name(dev), dev, dsi,
   406			&samsung_sofef01_m_bl_ops,
   407			&props);
   408		if (IS_ERR(ctx->panel.backlight))
   409			return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
   410					     "Failed to create backlight\n");
   411	
   412		drm_panel_add(&ctx->panel);
   413	
   414		ret = mipi_dsi_attach(dsi);
   415		if (ret < 0) {
   416			dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
   417			drm_panel_remove(&ctx->panel);
   418			return ret;
   419		}
   420	
   421		return 0;
   422	}
   423	

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